Visit Parvati Valley if you really want to chill plus looking for a cheerful company. You can start by staying at choj(village right after kasol), enjoy tasty langar at Manikaran Sahib and take a local bus to Barshaini. From Barshini you need to trek for half an hour to reach Kalga Village. Stay there for a day and start your trek to kheergange early morning(will take around 5 hours on an average). Spend your time in rejuvenating hot springs and spend the night pitching you own tent or maybe renting one. Next day trek back to Kalga, stay at Romani Cafe, enjoy brownies at German Bakery. For your final days travel down to Chalal and book a stay in POP(pirates of parvati). If you get time you can visit old Manali.